INDEX OF SUBJECTS. 



583 



"Hairy" Moorhen, 55 

 Halichoerus, vertebras, 123; molars, 242, 

 243 



Haliotis, extra row of perforations, 287; 

 perforations occluded, 287; perfora- 

 tions confluent, 287 

 Halla, imperfect segmentation in, 156 

 Hallux, duplicity in Man, 349; Fowl, 

 390; variations in Kittiwake (Rissa), 

 396; Erinaceus, 397; Herpestidae, 397, 

 normally absent in certain birds, 396 

 Hammaticherus hews, double (?) an- 

 tenna, 551 

 Hand, digital variations in, 324; double, 

 325, 331 

 progressive series of Conditions, 

 324 

 Hapalida?, teeth, 208 

 Harpalus, rubripes, extra legs, 493; cal- 



ceatus, double (?) antenna, 550 

 Hawthorn, variation of, 569 

 Hectocotylus, supernumerary, in Ele- 



done, 473 

 Helictis orientalis, teeth, 233, 234 

 Helix kermovani, extra e3'e, 280 



hispida, union of tentacles, 461 

 Heloderma, vertebrae, 123 

 Ilelops ceeruleus, extra antennae, 523 



sulcipennis, extra palpi, 524 

 Hemiaster ; cases in which one ambula- 

 crum wanting, 445 ; two ambulacra 

 reduced, 443 ; duplicity of ambulacra, 

 446 

 Hepialus humuli, males like females in 



Shetland, 254 

 Heptanchus, seven gills, 174 

 Heredity, objection to use of term, 75 ; 



in digital variation, 398 

 Hermaphroditism, 67 ; in bees, 68 

 Hermodice carunculata , abnormal seg- 

 mentation, 158 

 Herpestid.e, hallux, 397 

 teeth, 227-231 



Herpestes galera, 229; gracilis, 227, 

 228, 229; griseus, 229; ichneu- 

 mon, 229, 230, 231 ; microcephalus, 

 229; nipalcnsis, 227; nyula, 228; 

 persicus, 227; pulverulentus, 228, 

 229; smithii, 228, 229 

 Herring, supposed hybrid with Pilchard, 



275 

 Heterocephalus, a naked Eodent, 56 

 Heterogeneity, universal presence of in 

 living things, 18 

 symmetrically distributed 

 around centres or axes, 

 19 

 Heterorhina nigritarsis, division of pro- 



notum, 455 

 Hexanchus, six gills, 174 

 Hipparchia tithonus, eye-spots, 293, 294 

 Hippocampus compared with Pliyllo- 



pteryx, 309 

 Hippoglossus pinguis, 471 



Hippolyte fabricii, variation in epipo- 



dites of legs, 151 

 Hirudinea, variation in generative 

 organs, 165 

 in colours, 304 

 Hirudo medicinalis, variation in numbei 



of testes, 165, L66 

 officinalis, supernumerary penis, 

 166 

 HUter cadari rinus, extra legs, 512 

 Holopus rangi, 4-rayed specimen, 436 

 Holothurioidea, variation in number of 

 radii, 433; variations in numbers of 

 organs, 435; double monsters, 5C6 

 Homarus, repetition of parts in cheliped, 

 530; in chela , 531-538 ; colour varia- 

 tion, 44; hermaphrodite, 155 

 "Homodynamy," 133 

 Hornceosis, use of the term, 85 



between vertebra;, 106-127 : 

 backward and forward, use 

 of terms, 111; forward in 

 vertebra?, 112; backward in 

 vertebra, 111 ; in spinal 

 nerves, 144 ; of appendages 

 in Arthropoda, 146; in Beg- 

 ments of Annelids with re- 

 spect to genital organs, 162, 

 163, 167, eve; in teeth, 272; 

 in bilateral asymmetry, 465; 

 in parts of flowers, 111 

 Homology between members of Series 

 of Repetitions, 30 

 individual, not attributed if 

 series is undifferentiated, 

 32; attempt to trace in 

 mammas, 191 ; discuss* J 

 in the case of teeth, 269; 

 in the case of digits, 351, 

 391, 371, 377; in the case 

 of joints of tarsus of Blatta , 

 418 ; in the case of radii of 

 Holothurioidea, 433 

 Horns, Sheep, 285 ; Goat, 286; Boebuok, 

 286, 460 ; Chamois, 286 ; of EU A ■ 

 buck united in middle line, 4»ii» 

 Horse, similarity of fore and hind L< 

 25, 26 

 naked variety, 56 ; teeth, 244, 2 !•"> 

 cervical fistula?, 180 

 simultaneous variation of mane 



and tail, 309 

 extra digits, 360; by development 



of digit ii. 

 ;stil 367 

 by development 

 ofdigit iv,367 

 by development 

 of digits n 

 and iv, 368 

 by division of 

 digit in, 369 

 by intermediate 

 process, 371 



